Patrick Ben Koetter: > Use DNS (round robin) to provide more than one IP for server1.tld or cluster > the ip.
Georg Sch?nweger: > Does this solve the problem? if IP1 is down will postfix retry to send > via IP2? Or will postfix just defer the delivery? If so then > smtp_fallback_relay seems to me to be the better option because there is > no delay. The Postfix SMTP client tries all IP addresses, up to smtp_mx_address_limit or smtp_mx_session_limit, depending on which limit is reached first. Wietse